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目的观察26%四聚杀螺胺悬浮剂(MNSC)在云南省山区现场的灭螺效果。方法在云南省鹤庆县血吸虫病流行区选择有钉螺环境的玉米地和沟道,采用机械喷洒和喷壶喷洒灭螺,每种环境每种方法分MNSC和50%氯硝柳胺乙醇胺盐可湿性粉剂(WPN)2组。机械喷洒剂量6 g/m2,1次完成;喷壶喷洒每次剂量2 g/m2,3次,每次间隔7 d,总量6 g/m2。结果机械喷洒灭螺后7、15、30 d,玉米地MNSC组钉螺死亡率为88.68%～92.88%,WPN组为89.86%～90.32%,沟道MNSC组钉螺死亡率为89.97%～94.46%,WPN组为90.08%～96.74%,灭螺前和灭螺后2组钉螺死亡率差异均无统计学意义(P均>0.05)。喷壶灭螺后7、15、30 d,玉米地MNSC组钉螺死亡率为66.14%～89.11%,WPN组为78.40%～91.22%,沟道MNSC组钉螺死亡率为84.13%～94.27%,WPN组为85.81%～95.26%,2组钉螺死亡率差异均无统计学意义(P均>0.05)。结论26%四聚·杀螺胺悬浮剂在云南省山区现场灭螺效果较好。
Objective To observe the snail killing effect of 26% tetramethylpyrazol suspension (MNSC) in the mountainous area of Yunnan Province. Methods In the epidemic area of Heilongjiang Province, Heilongjiang Province, schistosomiasis schistosomiasis was selected to have corn fields and channels with snail environment. Mechanical spraying and spraying pot were used to kill molluscs. MNSC and 50% niclosamide ethanolamine salt wettability Powder (WPN) 2 groups. Mechanical spraying dose 6 g / m2, 1 time to complete; spray cans spray each dose of 2 g / m2, 3 times, each interval of 7 d, the total amount of 6 g / m2. Results On the 7th, 15th and 30th days after mechanical spraying, the mortality of snail in MNSC group was 88.68% -92.88%, that of WPN group was 89.86% -90.32%, and that of snail in MNSC group was 89.97% -94.46% WPN group was 90.08% ~ 96.74%, there was no significant difference in the mortality of Oncomelania snails between the two groups before and after molting (both P> 0.05). The death rates of snail in MNSC group were 66.14% ~ 89.11% in the maize field and 78.40% ~ 91.22% in the WPN group and 84.13% ~ 94.27% in the MNSC group, respectively (85.81% ~ 95.26%). There was no significant difference in death rates of snails between the two groups (all P> 0.05). Conclusion 26% tetramethoxazole SC suspending agent is better in the field of snail in Yunnan Province.